Analysis of Flood Characteristics in the Context of Climate Variability in Northern Algeria: Case of Cheliff Watershed
Extreme hydrological events, such as floods and droughts, are some of the natural disasters that occur in several parts of the world. They are regarded as being the most costly natural risks in terms of the disastrous consequences in human lives and in pr
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Contents 1 Introduction 2 Materials and Methods 2.1 Study Area 2.2 Data Collection and Analysis 3 Results 3.1 Annual Maximum Flows (Variability and Duration of Recurrence) 3.2 Monthly Variations of Maximum Flows 4 Discussions 5 Conclusion 6 Recommendations References
Abstract Extreme hydrological events, such as floods and droughts, are some of the natural disasters that occur in several parts of the world. They are regarded as being the most costly natural risks in terms of the disastrous consequences in human lives and in property damages. The main objective of the present study is to estimate flood events in Cheliff watershed in giving return periods at the gauged stations, which is A. Sadeuk Ben Abbes (*) and A. Bouderbala Department of Earth Sciences, University of Khemis Miliana, Ain Defla, Algeria e-mail: [email protected] M. Meddi Water Engineering and Environment Laboratory, Higher National School of Hydraulics, Blida, Algeria M. Renima Laboratory of Chemistry Vegetable-Water-Energy, University of Hassib Benbouali, Chlef, Algeria © Springer Nature Switzerland AG 2020 Abdelazim Negm, Abdelkader Bouderbala, Haroun Chenchouni, and Damia Barcelo (eds.), Water Resources in Algeria - Part I: Assessment of Surface and Groundwater Resources, Hdb Env Chem, https://doi.org/10.1007/698_2020_525
A. Sadeuk Ben Abbes et al.
located in a semiarid region in the northwest of Algeria. The choice of this area is due to the significant floods observed in this watershed, which are occurring mainly from 1960 and 2006. A study is carried out to know the temporal variability and the place occupied by peak flows for both annual and monthly levels, which can finally determine the peak output of flood. We will try to understand the evolution of average and extreme flows according to rainfalls that are temporally associated with them. Frequency analysis is performed on different series of observed annual and monthly average discharges, including classical statistical tools as well as recent techniques. The obtained results show that the annual maximum approach is more appropriate in this case. This study also indicates the importance of continuous data monitoring in these stations. Keywords Algeria, Annual maximum, Cheliff watershed, Floods, Peak flows
1 Introduction During floods, the maximum levels of water, the maximum speed or the maximum flow, and the duration of the overflow can cause problems which are ever dangerous. For this reason, it is very important to do studies flow, not a single flow, but for many return periods and many durations, so many data flows. Floods are one of the fundamental features of the regime of a watercourse. Unfortunately we do not have a long time series of flood data to draw global conclusions. Many studies on the genesis and the danger of the flood have been carried out for a few years in the world [1–7]. The prone Mediterranean countries which have been exposed to this type of phenomena that we can cite are France, Spain, and Italy [8], Morocco [9, 10], and Algeria [11]. Flooding is a common environ
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